Eollee geinding mill



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W. AGER. ROLLER GRINDING MILL.

Patented Jan. 1, 1884.

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ROLLER GRINDING MILL. No. 291,018. Patented Jan. 1; 1884.

I Ina/anion:

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PEIERS. Plum-Lithograph". Waihinghn. EC.

through an ordinary roller-mill, with my inone of the rolls shown inFig. 1 deta'ched,

showing the fish-tails or spreaders connected two pairsonlywiththirscalping-reels. These f rolls, which are of theusual form,are arranged WILSON AGER, OF

PATENT mer NEW YORK, n. Y.

ROLLER GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 291,018, dated January1, 1881:.

Application filed August 22, 1583.

ED ctZZ whom it may concern:

Be it known that I, WILSON AGER, a citil zen of the United States,residing at New York, in the county and State of New York, have inventednew, and pseful Improvements in Roller Grinding-Mills, of which thefollowing is a specification.

My invention relates to roller grinding-mills, and the purpose is toprevent the heating of the rolls and their journal-bearings, and theconsequent cloggingof the former by the ad hesion of the glutinousportions of the grain.

It is well known to millers that the expansion of the rolls, due totheir heating, necessitates the constant attendance of a force of men toadjust them until the heating and consequent expansion have reached themaximum. As some roller-mills contain five or six pairs of rolls, eachpair having a different adjustment, it is evident that the labor ofsetting these rolls to compensate for an increasing expansion is notonly a task for an expert, but requires constant and close attention.There are also mills in which a stationary half-comb is set up to arevolving burr-stone; but in this apparatus the moment the parts becomeheated the moisture in the grain combines with its gluten and forms ahard tenacious gum, which covers the stone, necessitating the removal,cooling, and cleansing of the latter.

The object of my invention is to avoid these objections; and to this endmy invention consists in the novel combinations and arrange ments ofparts hereinafter described and claimed, and illustrated in theaccompanying drawings, in which- Figure 1 is acentral vertical sectiontaken vention attached. Fig. 2 is a perspective of therewith, andytheair-pipes leading to the and partly in elevation, showing the journal- Ain said drawings represents the rolls of side byside, their shaftscarried by journalboxes A,with a hopper, B, above the upper pair,through which the grain is fed; 4

(No model.)

Oindicates the scalping-reels arranged beneath each pair of rolls, andas these parts are of the usual construction no specific description isneeded.

D represents an ordinary air fan and drum, by which an air-blast iscreated. A pipe, E, leads from said drum, and is carried upward to apoint a little above the hopper B, said pipe being provided with lateralbranches-e, 6,6 6", e, and c ,by which air is conveyed to the followingpoints: The upper branch, e, is carried down through thehopper B, and toits extremity is attached a spreader, H, having a length about equal tothe length of the corrugated periphery of the roll. The open edge ofthis spreader is arranged at a point just above that at which the rollsact upon the grain, and the air from it is driven downward between therolls together with the grain, the continuous current keeping both therolls and the crushed grain from heating. The branch c' is carried fromthe main pipe beneath the rolls, and has arms ff, one for each roll, andeach having a spreader, F, its open edge being in close proximity to thecorrugated body, and delivering a blastupward at a point not far fromwhere the chop leaves the roll, as shown in detail in Fig. 2. The branch6 is carried from the main pipe over the journal-boxes A, and has armsgg leading to each box. As the bearing upon the rollshafts is downward,the cap a of the journalbox is cut away to form an airspace, a, fromwhich lead escape-openings c a, as shown in Fig. 3. As the branch 9enters the center of the cape, the air will flow therefrom over thejournal and pass off through the openings a". The branch 6" issubstantiallya duplication of the pipe e, withits spreader, and the pipee is similar to 0, while the branch 6 is essentially the same as thepipe 6 By this invention the heating of the rolls and the consequentgumming and clogging as well asthe necessity of constant watching andadjustment, are effectually obviated.

Having thus described my invention, what I claim is- 1. In a rollergrinding-mill, the combination, with a pair of grinding-rolls arrangedside by side to receive the grain between them, of an air-blast devicearranged to deliver a blast of air upon the rolls between theiradjoining surfaces at or near a point where they receive the grain, andmeans for delivering blasts of air to the respective journals of therolls, substantially as described.

2. In a roller grinding-mill, the combination, with a pair ofgrinding-rolls, of means for delivering air upon the rolls at apoint ator near which they receive the grain, and means for delivering airbeneath the rolls at or near the point or points where the chop leavesthe rolls, substantially as described.

3. In a roller grinding-mill, the combination, with pairs ofgrinding-rolls, of blast mechanism, a pipe leading therefrom, andbranches extending from said pipe and arranged to deliver blasts of airdownward upon the rolls at or near a point where they receive the grain,upward upon the rolls at or near the point where the chop leaves therolls, and upon the journals of the rolls, substantially as described.

I. The combination,with the rolls of a roll-' er-inill, of a pipedelivering an air-blast downward between said rolls, and separate pipesarranged beneath each and throwing air upward against said rolls at ornear the point where the chop leaves them, substantially as described.

5. In a roller grinding-mill, the combination of the grinding-rollshaving end journals, the journal-boxes supporting the journals. the capsarranged over the journals and having airescape perforations, andblast-pipes passing into the caps for delivering air upon the journals,substantially as described.

6. The combination, with the roll-shafts of a roller-mill,ofjournal-boxeshaving air-spaces formed in the caps, and air-openings ateach end of said spaces, air-pipes tapped into said caps, and means forforcing a continuous blast through the same, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

\VILSON AGER.

Witnesses:

.Tnrns L. Nonuis, .T. A. illurnnnronn.

